172-65605M-14 (SQ2/SQ4/SQ6) 10 Dec 2019
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4. Option: Wiring of the control panel for the circulating pump
(standard models only)
The unit has an optional control panel for the circulating
pump. In order to link up with operation of the circulating
pump, the circulating pump should be connected to this
control panel.
(1) Remove the side cover from side of the unit on which
the control panel for the circulating pump is installed.
(2) Remove the control panel cover.
Loosen each of the corner screws with a Phillips
screwdriver to remove the cover. When reattaching the
cover after the wiring work is complete, make sure that
each screw on every corner has been firmly fastened
so there are no gaps between the cover and body.
Any gaps between the cover and body will limit the
waterproof protection for the control panel, and
consequently water leakage from piping etc. may
cause an accident such as an electric leakage.
(3) Connect the power cable to the E, L2
and N3 terminal blocks.
Terminal block numbers
Pump power source
L2, N3
Ground
E
(Pump power is limited to single phase
100 V AC, 0.4 kW or less.)
(The ground is shared with the ground
of 100 V AC power supply for the main
control panel.)
(4) When obtaining the operation output to
display the operation status, use the
output terminal on the control panel for
the circulating pump.
The operation output of the unit’s
control panel (as mentioned on the
previous page) is used in linking with the control panel for the circulating
pump, therefore the terminal block of the control panel for the circulating
pump is used.
Terminal
Block No.
Pump Power
Supply
(Single phase
100 V)
Operation
Output
(Voltage free
Contact)
E L2 N3
3 4
